DMJM HARRIS 4 -2008 - Laserfiche WebLink

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City of Santa Ana On -Call Civil Engineering, Architectural & landscaping Design Services 0 f • i 0 FOR SAMPLE PROJECT City of Santa Ana Arterial Highway Rehabilitation L Px ro1-eCt Descrip on The City of Santa Ana has identified a one -mile segment of arterial highway as in need of rehabilitation. The highway consists of four lanes separated by a raised median island. It is assumed for this purpose that this highway will include localized reconstruction areas along with overlay of the existing asphalt. A. Kickoff Meeting —A meeting will be scheduled with the City of Santa Ana, and any other stakeholders in the project, including Caltrans. B. Record Research — DMJM Harris will obtain all record data available from the City Central File Room. It is expected that plans for all existing improvements, striping, and signals are available. C. Field Assessments — The site will be reviewed to identify asphalt reconstruction limits, damaged curb, gutter and sidewalk, and to locate new sidewalk access ramps. DMJM Harris will field walk a minimum of three times to ensure all items are accounted for. DMJM Harris requests that City staff join us on the initial field walk to obtain concurrence on our findings. This initial review can also act as the basis for the "Field Review Form" for Caltrans requirements. D. Field Survey — Aerial mapping and field survey will be performed. Field survey will include topographic features and cross sections at 50-foot intervals. E. Utility Coordination — Initial letters will be sent to all utility companies requesting maps of all their facilities within the project location. These utilities will be plotted on the project base map. At the 95% completion stage, the pre -final plans along with the typical sections will be sent to the utility companies requesting a review to ensure their utilities are plotted correctly, identify any potential conflicts and provide the construction schedule. F. Geotechnical Investigation — Coring and sampling of subgrade soils will be performed at strategic locations. Laboratory testing will determine the sand equivalent, R- Value, sulfate and chloride content. Engineering analysis of the collected data and preparation of report with pavement section design considering alternative pavement sections. If desired, deflection testing will also be performed and included in the analysis. G. Plan Preparation — The project plans will be prepared in Microstation format, imperial units, and will include the Project Title Sheet; Typical Sections; Plan and Profile (20 scale) that includes utilities, proposed improvements, grades for curb replacement for segments over 20- feet, as necessary; Striping Plans (40 Scale, Double -Stacked); and Traffic Control Plans (40 Scale, Double - Stacked). Work flow for the design includes the plotting of the street cross -sections to determine the impact of the proposed overlay at the joins. Along the outside curb lanes, edge grinding will be necessary to join the edge of gutter. The cross slope will be verified that it is within the given requirements (<5%). At the raised median, edge grinding is usually not an option as it will potentially trap water along the median curb. Due to this, the median must be paved against, thus reducing the effective curb height. Criteria must be established in determining if the remaining curb height is acceptable. If it is not, the options include the reconstruction of the median improvements with standard height curb, or reducing the street's final surface through the use of rubberized asphalt overlay, area cold milling the width of the street, or complete reconstruction of the street section. Cost alternatives will be prepared for these scenarios. H. Specifications — Using the City boilerplate, specifications will be prepared in Word format and will be based upon the Greenbook. Caltrans references will be made as necessary for traffic striping and signal detector loops. 1. Cost Estimates — Detailed estimates will be provided at the 75%, 95% and 100% completion dates. The estimate will be formatted to identify items eligible for reimbursement, if state or federally funded. J. Caltrans Coordination — As required, DMJM Harris will assist the City as needed in preparing the required checklists, such as the Field Review Form, PS&E, Utility, and the Right -of -Way, to ensure the Authorizations to Proceed are secured from Caltrans. K. Submittals — The submittals will occur at the 35% completion stage (conceptual), 65%, 95% and 1001/0 completion. The 95% submittal will be complete for final review. City comments from the 95% submittal will be incorporated and a final signature submittal (original mylars) will be made at 100%. L. Scheduling — If required, DMJM Harris will develop a project schedule, with the City's input, that will deliver the project in a timely matter. This will include ample time for Caltrans to process the Authorization to Construct, if necessary, so the City does not risk the loss of any monies due to the expiration of the funding.